Worth Data 5000 Downloading a table to the TriCoder, Preventing duplicate entry of data

08000000000EXAMPLE2

11111111

22xxxxxx

33333xxx

44444444

Ctrl Z (ASCII 26) (use if a DOS file)

EXAMPLE2 above would accept a scan or entry of 22 when EXAMPLE1 would not.

Preventing duplicate entry of data

Sometimes you might want to make sure that an item in your table is not scanned or entered twice. You can prevent duplicate data when using a data validation table by specifying the following in the DATA ID field:

Data ID entry	description
D1D	Prevent duplicate entry for Table

If you have specified DxD in the DATA ID field and happen to enter the same data twice, the TriCoder will respond with the following error message:

DUPLICATE ACCESS

HIT ANY KEY_

Hit any key to return to the statement prompt again.

The file format to prevent duplicate access for table data validation looks almost identical to the above example for simple data validation with a few exceptions:

As with the original example, the header record uses the first 2 digits to specify the data length, but the next 3 characters are F01 (specifies duplicate entry) and each data record has an additional 0 added to the low order position:

06F01000000EXAMPLE1

1111110

2222220

3333330

3242110

3656670

Ctrl Z (ASCII 26)

The TriCoder uses the 0 (zero) at the end of each record to determine whether a record in the table has been accessed or not. When a record is accessed, the 0 (zero) changes to a 1. If the user enters the same data twice, the TriCoder will look at the table and see a 1 at the end of the matching data, indicating that the record had been accessed previously. Once accessed, the table cannot be reset to its original status. You would have to re-download the table to use the table in its original format.

Downloading a table to the TriCoder

Tables are downloaded to the TriCoder using the Hardware Utilities on a Windows PC by either Full speed USB or Serial. Before you can download a table, you must have:

oProgrammed the TriCoder to work with Tables

oSetup the TriCoder I/O Settings as either Serial or Full Speed USB (Windows)

See Chapter 9: Using the Integrated Hardware Utilities for instructions and details on downloading a table using the Hardware Utilities.

82